<template>
  <div class="progress-circle">
    <svg :width="radius"
         :height="radius"
         viewBox="0 0 100 100"
         version="1.1"
         xmlns="http://www.w3.org/2000/svg">
      <circle class="progress-background"
              r="50"
              cx="50"
              cy="50"
              fill="transparent" />
      <circle class="progress-bar"
              r="50"
              cx="50"
              cy="50"
              fill="transparent"
              :stroke-dasharray="dashArray"
              :stroke-dashoffset='dashOffset' />
    </svg>
    <slot></slot>
  </div>
</template>

<script type="text/ecmascript-6">
export default {
  props: {
    radius: {
      type: Number,
      default: 100
    },
    percent: {
      type: Number,
      default: 0
    }
  },
  data () {
    return {
      dashArray: Math.PI * 100
    }
  },
  computed: {
    dashOffset () {
      return (1 - this.percent) * this.dashArray
    }
  }
}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable'
.progress-circle
  position relative
  circle
    stroke-width 8px
    transform-origin center
    &.progress-background
      transform scale(0.9)
      stroke $color-theme-d
    &.progress-bar
      transform scale(0.9) rotate(-90deg)
      stroke $color-theme
</style>